Air-pump.



PATENTED JULY 9, 190?.

H. NYBERG.

AIR PUMP.

APPLloATIoN FILED MAR. zo. 1905.

z sHBETs-sHEBT 1.

PATENTRD JULY 9, 190'?.v

H. N YBERG.

AIR PUMP.

APPLICATION PILEDMAR. zo, 1905.

2 SHEETS-SHEET 2.

HENRY NYBERG, OF CHICAGO, ILLINOIS.

.sm-PUMP.

Specification of Letters Patent.

Patented'uly 9, 1967,

Appleman sied Marti 2o, 1905. sessi No. 251,043.

To all whom it maj/concern.' j

Be it known thatl, HENRY NYBERG, a citizen of the United States of America, and a resident 0i Chicago, in the county ol Cook and State of Illinois, have invented certain new and useful Improvements in Air-Pumps, of which the following is a specification.

f" The main objects oi my invention are to provide an improved form of .air pump, which shall be simple, compact, light, efficient ,end particularly adapted for inating the pneumatic tires`of automobiles; to provide simple means for readily connecting the same with the driving mechanism oi the vehicle; and to provide an improved form of casing adapted to protect from dust and dirt, the driving mechanism of the pump.

I accomplish these objects by the device shown in' the accompanying drawings, in which:

Figure 1 is a side elevation oi an automobile air pump constructed according to my invention. Fig. is a longitudinal section through the cylinders o the Jpump on the line 2-2 oi Fig. 1. Fig. 3 is a transverse section oi one oi the cylinders on the line 3--3 oi Fig. 2. Fig. Ll is asection oi Fig. 2 on the line 4 4.

In the construction shown in the drawings, the main frame oi the pump consists oi a casing 4 which is formed oi two sections rigidly connected together by flanges 5, the joint being in a plane extending transversely through the crank chamber 7. Each half oi the casing is provided with a cylinder 6 opening toward the crank chamber. Said cylinders are in axial alinement with cach other and each is provided with a piston 8. The pistons are rigidly connected together by the piston rod 9 which is prelcraoly integral therewith and extends between the pistons at one side of the axial line' oj the cylinders. A. crank plate 10 is mounted on the shaft 1l, which is journaled in one side oi the casing 4 on an axis intersecting. the axis of the cylinders and at right arrglas thereto. The plate 10d is provided with a crank pin 12 which is connected by means o a pitman 13 with one oi the pistons 8. The said piston is cored out to/ form a central recess 11i for receiving the end of the pitrnan, which is secured in'position by the wrist pinI 15 extending transversely through the piston. The wrist pin is secured against shifting endwise by thepiston rings 16, which are seated in anannulargroove in the piston in the usual manner. The plate. 10 is provided on the face, which is opposite to the crank pin,with`a concentric internal gear 17. Rotation is imparted to the plate l0 by means oia pinion 18 which meshes with the gear 17, as indicated by the dotted pitch circles in Eig. l. Theshait of the pinion 18 extends through the casiugfatfone side ofthe shaft 11 and rries at its outer end a pulley -l9 which has a suitable friction surface 20 on its periphery 'for engaging the'y wheel of the en .l gine and utilizing power therefrom. The-plane ofthe /fjjoint betweetlie parts of the casing 4 preferably coin- 'rcidefwiththeplane of the shaft 11 and the shaft ofthe pinion 18, so that saidshafts may be readilyremoved without disturbing the l connection oi the gears and their shafts.

Each cylinder is provided at its outer end with a passage 2l communicatingwith a valve chest 22. These valve chests' contain the air inlet. and o'utlet valves'. The air inlet openings are preferably in the endsof the. valve chests and are therefore not shown in the drawings. The air outlets are eachl connected by piping 23 with an oil separator 24, to whichis attached a flexible tube which shouldlbe oi sulicient length to. connect with the air valves oi any oi the tires of the vehicle. The piping 23 isprovided with a union 25 for permitting the ready separation of the parts oi the casing.

One end of the casing is pivoted. at 26 to a bracket 27 which is rigidly secured to a part 28 of the supporting ramework of the vehicle. The other end of the casing 4 is connected by means of a pair of toggle links 29 with a pin 30, also rigidly secured to some adjacent part of the supporting frame, in suitable position to bring the periphery of the pulley 19 adjacent to th periphery oi the iy wheel of the engine. The said :ily wheel is in* dicated at 31 in the drawings. The spring 32 connects the casing with the supporting frameworkI and normally urges the pulley'20 intokirictional contact with the fly wheel 31. The position of the toggle links is controlled by means of a rod 33. The full lines in'Fig.

l show the toggle links in their'collapsed position, asV when the pump is being operated. When .the pivot 34 is moved to the position indicated by the dotted lines 3y, the lugs 35 will prevent further bending of the toggle jointl in an upward direction and the spring 32y will then serve to prevent collapsing of the toggle joint and thus hold the 'pulley 19y out oi contact with the fly wheel ./31, until the rd 33 is pulled ina downward direction. y

l" The oil separators 24 consist ofa hollow casing having "inlet and outlet passages and' having interposed between said passages a plurality of curved delectors or partitions 36. These break the direct flow of the air and cause any oil which isi-carriedby the air to be deposited on adjacent walls. This ol'flows to the bottom l of the casing and is removed by a blow off cock 37.

The operation of the mechanism of the pump will be readily understood from the foregoing description.

It will'be noted that allof the gearing and pitmn mechanism is inclosed bythe casing and is at the sanie timereadily accessible through the separability ofthe parts oi the casing and all of the working parte are assembled in compact form between the adjacent ends of the cylinders. The pistons are rigidly connected together in such manner that one maires its suction stroke while the other is discharging. The pull of the frictional contact between the pulley and ily wheel is in-` creased to give the desirediair pressure in the cylinder by the gearing. The pump is started or stopped by merely shifting the rod 33, the toggle and spring mechanism being self locking in either position. Any 1ubricating oil which is carried out ofthe cylinders by the air is removed at the separator 24 and can therefore cause no injury to the tires. C

It will be seen that numerous details of the construction shown may be altered without departing from the spirit of my invention..

What I claim as my invention and desire to secure by Letters Patent, is:- A

1. In a device of the class described, the combination of a frame, a pair ofvopposed cylinders mounted in said frame in axial allnement and each open .toward the other, pistons slidable in said cylinders, a piston rod rigidly connecting said pistons togetherI and extending between the sinne at' one side of the axes of said cylinders, a crank journaledwithin Athe casing and between the pistons, a. pitma'ixvconnecting said crank and piston, and a driving shaft having thereon within the casing, a pinion geared to said crank.

2. Inla rierice of the class described, the combination of a frame, a pairl ot opposed'cylinders mounted in said frame in axial alinement and ca ch open toward the other, pistons slidable in said cylinders, a piston rod rigidly connecting said pistons together and extending between the same at one side of the axes of saidcylinders, an internal gear wheel journaled within the casing between A-the pistons, a pitman connecting said internal gear wheell and pistons, and a driving shaft extending` into the casing-and having apinion meshing with said internal gear wheel. v l

3. The combination of a frame, a wheel journaled therein, a closed casing pivotally mounted at one end near saidwheel, pumping mechanism in said casing, a friction pulley journaied on said casing and adapted to operate said pumpingmechanism, said friction pulley being movable into and out of engagement with said wheel through the rocking of said casing on its pivotal axis, `a toggle link pivotally connected to said casing, a second toggle link pivotally connected to the first and to said frame, a tension spring connecting the opposite ends of 

